Thin plate stacked structure and ink-jet recording head provided with the same

Abstract

A stacked structure is formed such that a plurality of thin plates, which include at least one liquid flow passage thin plate provided with a liquid flow passage having a predetermined pattern formed on at least one surface, are stacked with an adhesive. A release groove for releasing the adhesive is formed on the liquid flow passage thin plate. An air release hole, which is communicated with the release groove and which penetrates in the stacking direction, is bored through a thin plate stack stacked on the liquid flow passage thin plate. An opening, which allows the air release hole to be open to the outside, is formed on the thin plate disposed at the outermost layer of the thin plate stack. The air release hole has a diameter which is larger than the width of the release groove and which is larger than the opening disposed on the outermost layer. Any excessive adhesive is accumulated in the air release hole, and it is possible to greatly decrease the amount of the adhesive outflowing to the outside of a cavity unit.

What is claimed is: 
     
       1. A thin plate stacked structure comprising a plurality of thin plates which are stacked with an adhesive, the plurality of thin plates including at least one pattern-formed thin plate provided with a hole or a recess formed on at least one surface to extend in a predetermined direction, the stacked structure further comprising:
 a release grove pattern, comprising one or more release grooves, which is formed on the at least one surface of the pattern-formed thin plate and which releases the adhesive; 
 wherein the release groove pattern has a longitudinal dimension extending along the predetermined direction and a width dimension perpendicular to the longitudinal dimension; and 
 wherein none of the one or more release grooves intersect with any other grooves formed on the at least one surface of the pattern-formed thin plate; and 
 wherein the release groove pattern extends along the predetermined direction without the one or more release grooves having any straight portion extending parallel to the predetermined direction and any straight portion extending perpendicular to the predetermined direction. 
 
     
     
       2. The stacked structure according to  claim 1 ;
 wherein the predetermined direction is a long side direction of the thin plate. 
 
     
     
       3. The stacked structure according to  claim 1 ;
 wherein the recess or the hole is a liquid flow passage. 
 
     
     
       4. An ink-jet recording head comprising:
 a cavity plate which is composed of the stacked structure as defined in  claim 3 ; and 
 an actuator; 
 wherein the cavity plate has a plurality of nozzles, and the liquid flow passage is an ink flow passage for allowing an ink to pass from an ink supply surface to the nozzles. 
 
     
     
       5. The ink-jet recording head according to  claim 4 ;
 wherein the cavity plate includes a base plate having a plurality of pressure chambers arranged in the predetermined direction, and the groove, which extends while being inclined with respect to the predetermined direction, is formed to traverse at least two of the pressure chambers. 
 
     
     
       6. The stacked structure according to  claim 1 ;
 wherein an air release hole, which is communicated with the one or more release grooves and which penetrates in a thickness direction of the thin plate, is bored on the at least one surface of the pattern-formed thin plate. 
 
     
     
       7. The stacked structure according to  claim 1 ;
 wherein the one or more release grooves is/are formed in a meandering form. 
 
     
     
       8. The thin plate stacked structure according to  claim 1 ;
 wherein the release groove pattern comprises a plurality of grooves each of which is inclined with respect to the predetermined direction.